Laser-induced modification of hydrogenated detonation nanodiamonds in ethanol

0546568 - FZÚ 2022 RIV CH eng J - Journal Article
Bydžovská, Irena - Shagieva, Ekaterina - Gordeev, Ivan - Romanyuk, Olexandr - Němečková, Zuzana - Henych, Jiří - Ondič, Lukáš - Kromka, Alexander - Stehlík, Štěpán
Laser-induced modification of hydrogenated detonation nanodiamonds in ethanol.
Nanomaterials. Roč. 11, č. 9 (2021), č. článku 2251. E-ISSN 2079-4991
R&D Projects: GA MŠMT LM2018110; GA MŠMT(CZ) EF16_019/0000760; GA ČR GA19-14523S; GA ČR(CZ) GC21-12567J
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271 ; RVO:61388980
Keywords : nanodiamond * onion-like carbon * carbon nano-onion * laser * surface chemistry * structure * zeta potential * Raman spectroscopy
OECD category: Nano-materials (production and properties); Inorganic and nuclear chemistry (UACH-T)
Impact factor: 5.719, year: 2021
Method of publishing: Open access

Here, we used fully de-aggregated hydrogenated DNDs (HDNDs) dispersed in ethanol, which were irradiated for up to 60 min using a 532 nm NdYAG laser with an energy of 150 mJ in a pulse (5 J/cm2) at a pulse duration of 10 ns and a repetition rate of 10 Hz. We investigated the DND surface chemistry, zeta potential, and structure as a function of laser irradiation time. Infrared spectroscopy revealed a monotonical decrease in the C–Hx band intensities and an increase of the C–O and C=O features. Transmission electron microscopy (TEM) revealed the formation of OLC, as well as a gradual loss of nanoparticle character, with increasing irradiation time. Surprisingly, for samples irradiated up to 40 min, the typical and unchanged DND Raman spectrum was recovered after their annealing in air at 450 °C for 300 min.
Permanent Link: http://hdl.handle.net/11104/0323196